Dating direct nevada
Tributaries of the Snake River drain the far north, while the Colorado River, which also forms much of the boundary with Arizona, drains much of southern Nevada.
They called the region Nevada (snowy) because of the snow which covered the mountains in winter.
Nevada is largely desert and semi-arid, much of it within the Great Basin.
Areas south of the Great Basin are within the Mojave Desert, while Lake Tahoe and the Sierra Nevada lie on the western edge. Before European contact, Native Americans of the Paiute, Shoshone, and Washoe tribes inhabited the land that is now Nevada.
Two samples from premineralization units yield apatite ages concordant with the age of mineralization established by potassium-argon geochronometry, reflecting annealing of the apatite during the hydrothermal episode.
Potassium-argon dating of supergene alunite samples yields imprecise ages in the range 9 to 12 m.y.